Question

in going from left to right in a period. aiso option
a. the basic nature of oxides increase b. acidic nature decreases c. the basic nature of the oxides decreases d. no gradation in the nature of oxides is observed

Answer 1

c. the basic nature of oxides decreases is the correct answer.
On going from left to right in a period, the basic nature of oxides decreases.
From left towards right in a period, the metallic character decreases and non-metallic character increases. Hence, from left to right, in a period, basic nature of oxides decreases and acidic nature of oxides increases.